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CAM-4, A PORTABLE WARNING DEVICE FOR ORGANOPHOSPHATE HAZARDOUS MATERIAL SPILLS
Citation:
Goodson, L. AND B. Cage. CAM-4, A PORTABLE WARNING DEVICE FOR ORGANOPHOSPHATE HAZARDOUS MATERIAL SPILLS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-80/033.
Description:
CAM-4 is a completely portable, battery-operated, field version of the earlier cholinesterase antagonist monitor, CAM-1, which senses organophosphates and carbamates in water supplies. The present report describes the design, fabrication, and evaluation of the CAM-4 device. Like CAM-1, this device uses immobilized cholinesterase in an electrochemical cell for the detection of cholinesterase inhibitors in water supplies. CAM-4, however, is not fully automated and therefore requires an operator to observe the cell voltages recorded by the digital printer and to decide whether toxic levels of pesticides have been sampled. The elimination of automation provided in CAM-1 was a trade-off to provide 8-hr operation from a standard size 12-v automobile battery and to keep the weight and cost of the instrument low. Subtoxic levels of Mesurol, Nemacur, Baytex, DDVP, Systox, Furadan, and Sevin were all detected by CAM-4 at sensitivities comparable to those obtained with CAM-1.